a)
Interpretation: Effect of removal of solvent at temperatures below their normal points with help of rotary evaporator should be determined.
Concept introduction: Rotary evaporator is laboratory apparatus that is used to remove solvents with help of reduced pressure. This is designed in such way that allows fast evaporation of solvents. A variable-speed motor is used for rotation of flask that has solvent to be evaporated.
b)
Interpretation: Preference of rotary evaporation distillation over simple distillation should be determined.
Concept introduction: Rotary evaporator is laboratory apparatus that is used to remove solvents with help of reduced pressure. This is designed in such way that allows fast evaporation of solvents. A variable-speed motor is used for rotation of flask that has solvent to be evaporated.
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Chapter 4 Solutions
EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
- Explain through a laboratory experiment: How is recrystallization of Acetone possible? Can it or how would it be carried out if yes?arrow_forwardWhat is the effect of weighing a recrystallized organic solid which is not completely dried to the percentage yield? Elaborate.arrow_forwardExplain and elaborate how the following purification techniques work: a. Sublimation b. Recrystallizationarrow_forward
- Although we will not use a Claisen adapter in our apparatus, what quality of vacuum distillation does it mitigate?arrow_forwardTrue or False. It is very important to regulate the temperature of the heating mantle so that the distillation occurs at a rate of about 1 drop per 2 seconds. Explain why?arrow_forwardWhich of the following should be done if there is no recrystallization due to the unsaturation of the solution? (mixed solvent recrystallization) a. Crystal seeding b. Scratching the inner walls or bottom of container c. Further boiling of solvent d. Adding small amount of samplearrow_forward
- Draw a five-step Schematic diagram of the procedure on how to separate pure crystals of CuSO4 , Alum and Benzoic acid. (Draw only 1 schematic diagram for the three samples)arrow_forwardAssuming that either solvent is otherwise acceptable in a given instance, what advantages does ethanol have over 1-octanol as a crystallization solvent? Hexane over pentane? Water over methanol?arrow_forwardGive the advantages of using steam distillation in the recovery of an organic liquid from a mixture.arrow_forward
- illustrate and explain your answer Describe what happened to the undisturbed setups after leaving them in the sunlight.arrow_forwardWhat is the main information you wish to acquire when performing a melting point analysis? A) the percentage of impurities in your sample B) the average size of crystals after the crystallization process C) how much reagent has successfully turned into product D) whether the conversion from reagent to product was successfularrow_forward5. 1. What is the purpose of testing distilled water and laboratory ethanol in the testing of ethanol? 2. During the experiment, you recorded the vapor temperature of the samples. Does the literature B.P. of ethanol correspond to the recorded temperatures? Why or why not? 3. Based on the iodoform test, did your distillate portion contain ethanol and/or water? Explain?arrow_forward
- EBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT